I've had 4 of them now. One of each version (2002, 2003, 5.0 & 6.0). Id I plan on having more in the future.
- There's something cool about having the same operating system on my phone that I also have on a computer.
- I like being able to write programs which work on my phone.
- I get more excited about new versions, features, etc. with new versions than any other platform.
- and probably loads of other reasons too.
If you've built Windows Phone or Windows Store apps you can cross-promote them with AdDuplex to get more users.